2 Way Vacuum Check Valve – P/N 15733271

GM Vacuum Check Valve – P/N 15733271 – New (Bag of 5 Available Individually)
Genuine GM one-way vacuum check valve originally used in HVAC heater & A/C vacuum control systems. Common on many GM platforms including 1986-1987 Buick Grand National, Turbo-T, and T-Type. Maintains proper vacuum direction to prevent boost from entering vacuum-only components such as HVAC actuators, cruise control, and emissions controls.

🔵 Blue Dot – New / OEM Packaging

Specifications:
• GM Part Number: 15733271
• Function: Vacuum check / one-way valve
• Application: Heater & A/C vacuum control, cruise & emissions systems
• Material: GM composite plastic body
• Fitment: Compatible with standard GM vacuum hose sizes

Condition Notes:
• Brand-new OEM components
• Never installed, pulled from original GM packaging
• Clean and perfect function for vacuum-critical systems

Why You Want It:
A leaking check valve can cause AC vent changes under boost, weak cruise control, poor idle, and vacuum-related drivability issues. This is a must-have part when restoring correct factory vacuum routing on Turbo Buicks—especially cars running higher-than-stock boost where protecting vacuum devices is essential.

⚠️ All Turbo 6 Parts are sold as-is with no returns, refunds, or exchanges. Buyer is responsible for verifying fitment before purchase.